J.D. Falk wrote:
On Jul 20, 2010, at 7:46 PM, Hector Santos wrote:
It's not the wikipedia definition of greylisting, but they do use 4xx replies
to control the flow of inbound mail.
A SMTP customer I was working, provider a link showing a greylist
transaction. From my perspective, the user spoke as it was a
But I have yet to see it in the 2-3 weeks of exploring this YAHOO
issue with the customer. So it made me think the user was
experiencing maybe a YAHOO exploration into greylisting at the time or
it was done on a per IP basis or something. I have not seen it in all
our send mail attempts.
Absolutely, no pattern, inconsistent "DISCARDING" and delivery of mail.
Often, filters will be reacting to a system-wide pattern that
> an individual user can't see. To give an overly
> simplified and surely incorrect example, if a spammer were sending
> "test #4" all day, then your entirely legitimate "test #4" would
> get caught too.
That said, if the mail is being discarded due to system-wide
> (rather than recipient-specific) filters, I'd personally prefer
> to see a 5xx reply instead.
Well, I prefer they follow decades of SMTP practice of mail delivery
or bounce. Although new semantics has been written into 5321,
discarding mail is not recommended behavior, and IMHO, I don't mind
mentioning the behavior smacks against US ECPA provisions for "user
> But: their system, their rules.
Sure, but this random "discard" and mail delivery unknown practice,
rule or "protocol" is costing people time and money in solving mail
delivery issues when in fact, their are no transport or content issues
in what is otherwise private 1 to 1 messages.
My daughter (http://jaclynsantos.com) who had a yahoo account for a
long time has recently started gotten thousands of email because she
is a controversial contestant on the Bravo reality TV show, "Work Of
Art: Next Great Artist" and now what was once a reliable occasional
private sending mail to her by me or her mother, is now not getting
through - its random.
So I reminded her that she always had the jaclynsantos.com email
domain and server running with her Wildcat! based web site and can
avoid YAHOO altogether.